The center point of the television is right between two studs, therefore no stud for mounting the center channel speaker. Will hefty toggle bolts fastening the bracket to the drywall be enough to secure the VP100 to the wall, or are the studs absolutely necessary? A 1/8" (small) toggle is rated to hold 50 lbs, but will the vibration of the speaker be a problem? Will the drywall itself fail?